/* ============================================
   DEMO APP — Chrome styling for the snippet showcase
   ============================================
   Sidebar nav + content area + per-snippet preview cards.
   Dark theme by default.
   ============================================ */

:root {
  --bg: #0a0a14;
  --bg-2: #0f0f1c;
  --bg-3: #14141f;
  --bg-card: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --fg: #f5f5fa;
  --muted: rgba(255, 255, 255, 0.55);
  --muted-2: rgba(255, 255, 255, 0.35);
  --accent: #8b5cf6;
  --accent-2: #ec4899;
  --accent-3: #06b6d4;
  --shadow: 0 24px 50px -16px rgba(0, 0, 0, 0.5);
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
  background:
    radial-gradient(ellipse at top right, rgba(139, 92, 246, 0.08), transparent 60%),
    radial-gradient(ellipse at bottom left, rgba(236, 72, 153, 0.06), transparent 60%),
    var(--bg);
}

a { color: inherit; text-decoration: none; }

/* === Sidebar === */
.dapp-sidebar {
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  height: 100vh;
  position: sticky;
  top: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.dapp-brand {
  padding: 1.2rem 1.25rem 0.85rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}
.dapp-brand-logo {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: conic-gradient(from 0deg, var(--accent), var(--accent-2), var(--accent-3), var(--accent));
  flex-shrink: 0;
}
.dapp-brand-text {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}
.dapp-brand-meta {
  font-size: 0.65rem;
  color: var(--muted);
  margin-left: auto;
  padding: 0.1rem 0.4rem;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  font-variant-numeric: tabular-nums;
}

/* Search */
.dapp-search {
  padding: 0.85rem 0.85rem 0.6rem;
  flex-shrink: 0;
}
.dapp-search input {
  width: 100%;
  padding: 0.5rem 0.7rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--fg);
  font: inherit;
  font-size: 0.82rem;
  outline: none;
  transition: border-color 0.18s ease;
}
.dapp-search input::placeholder { color: var(--muted-2); }
.dapp-search input:focus { border-color: var(--accent); }

/* Nav list */
.dapp-nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.3rem 0 1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.dapp-nav::-webkit-scrollbar { width: 8px; }
.dapp-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.dapp-group {
  padding: 0.45rem 0.85rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-2);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  user-select: none;
  border-radius: 4px;
  margin: 0.1rem 0.4rem;
  transition: background 0.12s ease, color 0.12s ease;
}
.dapp-group:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
}
.dapp-group-chev {
  font-size: 0.7rem;
  color: var(--muted-2);
  margin-left: auto;
  transition: transform 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 12px; height: 12px;
}
.dapp-group-chev::before {
  content: '';
  width: 0; height: 0;
  border: 4px solid transparent;
  border-top-color: currentColor;
  margin-top: 2px;
  display: block;
}
.dapp-group.is-collapsed .dapp-group-chev::before {
  transform: rotate(-90deg);
}
.dapp-group-count {
  background: rgba(255, 255, 255, 0.05);
  padding: 0.05rem 0.35rem;
  border-radius: 3px;
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--muted);
}
.dapp-group-body {
  display: contents;
}
.dapp-group.is-collapsed + .dapp-group-body .dapp-item {
  display: none;
}

.dapp-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.78rem;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease;
  border-left: 2px solid transparent;
}
.dapp-item:hover { background: rgba(255, 255, 255, 0.04); color: var(--fg); }
.dapp-item.is-active {
  background: rgba(139, 92, 246, 0.1);
  color: var(--fg);
  border-left-color: var(--accent);
  font-weight: 500;
}
.dapp-item-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--border-strong);
  flex-shrink: 0;
}
.dapp-item.is-active .dapp-item-dot { background: var(--accent); }
.dapp-item-name {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.74rem;
}
.dapp-item-tag {
  font-size: 0.55rem;
  font-weight: 700;
  padding: 0.05rem 0.3rem;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  color: var(--muted-2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-left: auto;
}
.dapp-item-tag.is-pair {
  background: rgba(139, 92, 246, 0.18);
  color: #c4b5fd;
}

/* Sidebar footer */
.dapp-sidebar-foot {
  padding: 0.85rem 0.95rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.72rem;
  color: var(--muted);
  flex-shrink: 0;
}
.dapp-sidebar-foot a {
  color: var(--muted);
  transition: color 0.18s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.dapp-sidebar-foot a:hover { color: var(--fg); }

/* === Content === */
.dapp-content {
  padding: 0 0 4rem;
  overflow-x: hidden;
  min-width: 0;
}

.dapp-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.95rem 2rem;
  background: rgba(10, 10, 20, 0.8);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.dapp-crumb {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--muted);
}
.dapp-crumb-sep {
  color: var(--muted-2);
  font-size: 0.7rem;
}
.dapp-crumb-current {
  color: var(--fg);
  font-weight: 600;
}

.dapp-header-actions {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.dapp-btn {
  padding: 0.4rem 0.7rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  color: var(--fg);
  font: inherit;
  font-size: 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.dapp-btn:hover { background: rgba(255, 255, 255, 0.12); }
.dapp-btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #fff;
}

/* === Landing === */
.dapp-landing {
  padding: 4rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}
.dapp-landing-hero {
  text-align: center;
  margin-bottom: 3rem;
}
.dapp-landing-hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  margin: 0 0 0.7rem;
  background: linear-gradient(135deg, #fff 0%, #fff 50%, #8b8b8b 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.05;
}
.dapp-landing-hero p {
  font-size: 1.1rem;
  color: var(--muted);
  margin: 0 auto;
  max-width: 600px;
  line-height: 1.6;
}
.dapp-landing-meta {
  display: inline-flex;
  align-items: center;
  gap: 1.5rem;
  margin: 1.5rem auto 0;
  padding: 0.65rem 1.2rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--muted);
}
.dapp-landing-meta strong { color: var(--fg); font-weight: 700; }

.dapp-landing-ctas {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem;
  margin-top: 2rem;
}
.dapp-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.2rem;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 9px;
  border: 1px solid var(--border);
  color: var(--fg);
  background: rgba(255, 255, 255, 0.06);
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.dapp-cta:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-strong);
}
.dapp-cta-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #fff;
  background-size: 200% 200%;
}
.dapp-cta-primary:hover { background-position: 100% 50%; }
.dapp-cta-icon {
  width: 18px; height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.dapp-landing-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.dapp-stat {
  text-align: center;
  min-width: 110px;
}
.dapp-stat-num {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--accent-3));
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.dapp-stat-label {
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  margin-top: 0.3rem;
}

.dapp-section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin: 3.5rem 0 1rem;
  gap: 0.8rem;
}
.dapp-section-title {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
}
.dapp-section-sub {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.dapp-featured {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.7rem;
  margin-top: 1.2rem;
}
.dapp-featured-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.dapp-featured-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}
.dapp-featured-preview {
  height: 120px;
  display: grid;
  place-items: center;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  position: relative;
  background:
    radial-gradient(ellipse at center, rgba(255, 255, 255, 0.03), transparent 70%);
}
.dapp-featured-body {
  padding: 0.7rem 0.85rem;
}
.dapp-featured-name {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.8rem;
  font-weight: 600;
  margin: 0;
}
.dapp-featured-desc {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 0.2rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.dapp-landing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.9rem;
  margin-top: 2.5rem;
}

.dapp-cat-card {
  display: block;
  padding: 1.1rem 1.1rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  position: relative;
  overflow: hidden;
}
.dapp-cat-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.05);
}
.dapp-cat-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cat-c, var(--accent)), transparent);
  opacity: 0.5;
}
.dapp-cat-icon {
  font-size: 1.6rem;
  margin-bottom: 0.45rem;
}
.dapp-cat-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.15rem;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.dapp-cat-count {
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 0.45rem;
}
.dapp-cat-desc {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* === Component view === */
.dapp-view {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 2rem 4rem;
}

.dapp-view-head {
  margin-bottom: 1.5rem;
}
.dapp-view-title {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 0.4rem;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.dapp-view-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--muted);
}
.dapp-view-path {
  padding: 0.15rem 0.45rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.72rem;
  color: var(--fg);
}
.dapp-view-pill {
  padding: 0.1rem 0.45rem;
  background: rgba(139, 92, 246, 0.18);
  color: #c4b5fd;
  border-radius: 999px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.dapp-view-pill.is-js  { background: rgba(251, 191, 36, 0.18); color: #fcd34d; }
.dapp-view-pill.is-css { background: rgba(34, 211, 238, 0.18); color: #67e8f9; }

.dapp-view-desc {
  font-size: 0.95rem;
  color: var(--fg);
  margin: 1rem 0 0.4rem;
  line-height: 1.55;
}
.dapp-view-tags {
  margin-top: 0.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.dapp-tag {
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--muted);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}

/* Preview area */
.dapp-preview {
  margin-top: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.dapp-preview-head {
  display: flex;
  align-items: center;
  padding: 0.55rem 0.85rem;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--border);
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.dapp-preview-tabs {
  display: inline-flex;
  gap: 0.1rem;
}
.dapp-preview-tab {
  background: transparent;
  border: 0;
  color: var(--muted);
  font: inherit;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.3rem 0.55rem;
  border-radius: 4px;
  cursor: pointer;
}
.dapp-preview-tab:hover { color: var(--fg); background: rgba(255, 255, 255, 0.05); }
.dapp-preview-tab.is-active {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.08);
}
.dapp-preview-actions {
  margin-left: auto;
  display: inline-flex;
  gap: 0.25rem;
}

.dapp-preview-body {
  padding: 2.5rem 2rem;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background:
    radial-gradient(ellipse at center, rgba(255, 255, 255, 0.02), transparent 70%);
}
.dapp-preview-body.is-dark {
  background:
    radial-gradient(ellipse at center, rgba(255, 255, 255, 0.02), transparent 70%),
    #050510;
}
.dapp-preview-body.is-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  align-items: stretch;
  justify-content: stretch;
}
.dapp-preview-body.is-grid > * {
  align-self: center;
  justify-self: center;
}

/* Source pane */
.dapp-source {
  display: none;
  padding: 0;
  background: #050510;
}
.dapp-source.is-open { display: block; }
.dapp-source pre {
  margin: 0;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.78rem;
  line-height: 1.6;
  color: #d4d4dc;
  max-height: 520px;
  white-space: pre;
}

.dapp-empty {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 2.5rem 1rem;
}
.dapp-empty-hint {
  font-size: 0.75rem;
  color: var(--muted-2);
  margin-top: 0.5rem;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}

/* Folder index — list of all snippets in folder */
.dapp-folder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.7rem;
  margin-top: 1.5rem;
}
.dapp-folder-card {
  display: block;
  padding: 0.85rem 0.95rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.18s ease, transform 0.18s ease, background 0.18s ease;
}
.dapp-folder-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.05);
}
.dapp-folder-card-name {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  color: var(--fg);
}
.dapp-folder-card-desc {
  font-size: 0.76rem;
  color: var(--muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.dapp-folder-card-foot {
  display: flex;
  gap: 0.3rem;
  margin-top: 0.5rem;
}

/* Loading / error */
.dapp-spin {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: dapp-spin 0.9s linear infinite;
  display: inline-block;
}
@keyframes dapp-spin { to { transform: rotate(360deg); } }

/* Mobile */
@media (max-width: 760px) {
  body { grid-template-columns: 1fr; }
  .dapp-sidebar {
    position: fixed;
    z-index: 100;
    left: -280px;
    transition: left 0.3s ease;
    box-shadow: 8px 0 24px -8px rgba(0, 0, 0, 0.4);
  }
  body.is-sidebar-open .dapp-sidebar { left: 0; }
  .dapp-mobile-toggle {
    display: inline-flex !important;
  }
}

.dapp-mobile-toggle {
  display: none;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  cursor: pointer;
}

/* Category color hints */
.dapp-cat-3d           { --cat-c: #f87171; }
.dapp-cat-ai           { --cat-c: #67e8f9; }
.dapp-cat-animations   { --cat-c: #c4b5fd; }
.dapp-cat-backgrounds  { --cat-c: #fbcfe8; }
.dapp-cat-blocks       { --cat-c: #fcd34d; }
.dapp-cat-borders      { --cat-c: #fb7185; }
.dapp-cat-components   { --cat-c: #8b5cf6; }
.dapp-cat-data-viz     { --cat-c: #34d399; }
.dapp-cat-effects      { --cat-c: #ec4899; }
.dapp-cat-feedback     { --cat-c: #fbbf24; }
.dapp-cat-interactions { --cat-c: #a5b4fc; }
.dapp-cat-layout       { --cat-c: #93c5fd; }
.dapp-cat-media        { --cat-c: #f0abfc; }
.dapp-cat-micro        { --cat-c: #6ee7b7; }
.dapp-cat-responsive   { --cat-c: #94a3b8; }
.dapp-cat-scroll       { --cat-c: #fdba74; }
.dapp-cat-shaders      { --cat-c: #06b6d4; }
.dapp-cat-svg          { --cat-c: #d8b4fe; }
.dapp-cat-transitions  { --cat-c: #fb923c; }
.dapp-cat-typography   { --cat-c: #84cc16; }
.dapp-cat-utils        { --cat-c: #64748b; }